A paper published last year in Icarus, the prestigious journal of planetary science, asked if it was possible that terrestrial life on Earth had been 'seeded' from beyond the Earth - and if so, does the building block of that life, DNA, contain any sort of message from our alien creators. Using mathematics, the authors of the paper - "The "Wow! signal" of the terrestrial genetic code" - looked for evidence of a statistically strong 'informational' signal in the genetic code, with surprising results.